Hi! I made some bumblebee transformer cupcakes and had the same dilemma.  I seem to be doing more 2D & 3D cakes so I decided to cut them from a stencil I made.  I just Googled for the coloring pages and cut the pattern out in pieces (easier to me than making cuts in the entire face).  Since the pattern was in pieces, I cut 12 of each and sugar glued them to the fondant topper.  Since you have more space to work with it would be easier for you to cut the pieces....